implacable
UK /ɪmˈplækəb(ə)l/ · US /ɪmˈplækəbəl/ adjective
- adjective Not able to be placated or appeased.
- adjective Impossible to prevent or stop; inexorable, unrelenting, unstoppable.
- adjective Adamant; immovable.
Synonyms
impacable irreconcilable unassuageable unplacable unpleasable relentless unremitting unyielding
Antonyms
Etymology
From Middle English implācāble (“immitigable, unappeasable”) from Old French implacable (“harsh, unrelenting; implacable”) (modern French implacable), from Latin implācābilis (“unappeasable, implacable; irreconcilable”), from im- (variant of in- (prefix meaning ‘not’)) + plācābilis (“placable; appeasing, moderating, pacifying, propitiating; acceptable”) (from plācō (“to assuage, pacify, placate; to appease; to reconcile”) + -bilis (suffix forming adjectives indicating a capacity or worth of being acted upon)).
Webster’s 1913
- adjective Not placable; not to be appeased; incapable of being pacified; inexorable; as, an implacable prince.
- adjective Incapable of ebign relieved or assuaged; inextinguishable. [R.]
Etymology [L. implacabilis; pref. im- not + placabilis: cf. F. implacable. See Placable.]
Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “implacable”, CC BY-SA 4.0. Details